New Chesterfield manager Danny Wilson has brought in Chris Morgan as the League One club's first-team coach.
Morgan, who had been in charge of Sheffield United's under-21 team, will take up the same post he held during Wilson's spell as boss at Bramall Lane.
The 38-year-old had been with the Blades since joining as a player from Barnsley in 2003.
"I have no doubt the players will respond well to his methods," said Wilson, who was appointed last week.
"As well as being a good organiser, with bags of energy, Chris has a great sense of humour so he is able to relax people. I have no doubt the players will respond well to his coaching methods."